of加名词等于形容词。如：a women of wealth/wisdom/courage等于a wealthy/wise/courageous woman。of例句：We could all do with a cup of tea（要是能给我们都来杯茶就好了）。
of的例句：A flock of birds flew towards us slowly from far away（一群鸟儿从远处朝我们缓缓飞来）；Your extra fat may be more of a health risk than you realize（多余的脂肪对健康的威胁可能比你意识到的要大）。
